Marine instrument casing



FIG. 1 is a top perspective view of a marine instrument casing showing our new design;

FIG. 2 is a front view, with the rear being plain and unornamented;

FIG. 3 is a side view with the opposite side view being a mirror image; and

FIG. 4 is a top view, with the bottom view being identical;

FIG. 5 is a top perspective view of another embodiment;

FIG. 6 is a front view of the other embodiment with the rear being plain and unornamented;

FIG. 7 is a side view of the other embodiment, with the opposite side view being a mirror image;

FIG. 8 is a top view of the other embodiment; and,

FIG. 9 is a bottom view of the other embodiment. 

The ornamental design for a marine instrument casing, substantially as shown and described. 